Wasn't totally sure where to put this thread - but I will be DIY'ing my own track car. I'm not new to BMWs, or wrenching on them, but I've never built anything for track duty. As I spend the next few months planning a budget, I was looking for input on things I'm forgetting. The plan is the right smoking deal on an E36 coupe - either 325is(w/LSD) or M3 that will essentially be only for autox & track days, and just steetable enough to get it to an event. Once car is acquired, gone through, normal essential maintenance sorted through to have a solid starting base - I hear the cooling systems are ticking time bombs - in that case I would probably just put a better radiator/hoses in immediately. what are the essentials I need? I want to keep this relatively inexpensive... Current plan - Gut interior Coilovers Cage Tires/Lighter wheels (everyone seems to run kosei K1s?) Braided stainless brake lines & Better Pads/Rotors What else am I forgetting? Do most guys put in beefier control arms or sway bars? Thanks for your help! Look forward to experienced feedback!